> vegetable oils, which are a 20th century invention. I highly doubt that, my local open air museum has an oil mill from 1860 that was producing linseed oil: h

> vegetable oils, which are a 20th century invention. I highly doubt that, my local open air museum has an oil mill from 1860 that was producing linseed oil: https://freilandmuseum.de/besuchen/orientieren-im-museum/baugruppe-west/oelmuehle-von-der-flederichsmuehle https://freilandmuseum.de/besuchen/orientieren-im-museum/bau... Also you have thousands of years of history using olive oil. On the other hand the use of animal products is way higher than it used to be.